介绍了长短桩复合地基在一栋30层的高层建筑液化地基处理中的应用实例。长短桩由水泥粉煤灰碎石桩(CFG桩)和二灰桩组合而成。提出了复合地基承载力与沉降的设计计算方法,并且把承载力与沉降的计算值与实测值做了对比。结果表明,这种方法消除了地基的液化现象,满足了上部结构对地基承载力和沉降的要求,说明该计算方法是可行的。 The application example of long and short pile composite foundation in a 30-storey high-rise building liquefied foundation was introduced. Long and short piles are made of cement fly ash gravel pile (CFG pile) and lime-ash pile. The design and calculation method of bearing capacity and settlement of composite foundation are put forward, and the calculated values ​​and bearing values ​​of bearing capacity and settlement are compared. The results show that this method eliminates the liquefaction phenomenon of the foundation and satisfies the requirements of superstructure on bearing capacity and settlement of the foundation, which shows that this method is feasible.